US Army Corps of Engineers
Institute for Water Resources

Value to the Nation logo graphic

Value to the Nation


Water Supply: Water Supply Workshop 2009

A water supply workshop held in Tulsa, OK on June 2-3, 2009 was attended by 64 people representing Army General Counsel, USACE Headquarters (HQUSACE), four MSC's, 12 districts, IWR, the Northwestern Division (NWD) Hydropower Analysis Center as well as representatives from the Southwestern Power Administration and the states of Texas, Oklahoma and Kansas.

The workshop was a forum for participants to raise questions, share experiences, present their water supply management approaches, and increase their knowledge of U.S. Army Corps of Engineers municipal and industrial water supply program and policies.

Following an overview of the Tulsa District and their importance to the water supply mission of the Corps of Engineers, there were 25 presentations covering such topics as:

  • Water supply policy
  • Pricing
  • Guidance
  • Potential delegation
  • Policy/guidance rewrite of ER 1105-2-100
  • Data base and business line
  • Processing of reallocation studies
  • The water supply module of OMBIL
  • The water supply PCX
  • Water accounting
  • Dam safety impacts on reallocations
  • Sedimentation projections
  • Case study issues faced by the Baltimore, Nashville and Little Rock Districts
  • Legal issues surrounding the ACT/ACF (Lake Lanier, GA)
  • The relationships with our power marketing agencies and the mission of the Hydropower Analysis Center
  • Issues surrounding the Chatfield, CO reallocation

One major topic discussed was the theory and technical aspects of storage yield analysis. It was one of the key issues of concern to the workshop participants as there is currently no consistent approach in how different districts conduct such analyses for their storage reallocations studies.

A guest speaker from the state of Texas presented an interesting paper on Texas Water Issues and a representative from Kansas discussed the Kansas reservoir sustainability initiative.

A June 4 session analyzed the development of a portfolio of projects suitable for reallocation to municipal and industrial water supply. This session was attended by eight participants representing HQUSACE, four MSCs, IWR and one district to discuss the National Water Supply Portfolio for Reallocations. This study was authorized by the Office of Management and Budget for inclusion in the fiscal year 2008 and 2009 budgets.

Following a presentation on the Portfolio results and the plan of study, the June 4 session developed an outline with pros and cons on alternative funding scenarios and a method to prioritize reallocations. A final draft of the document is scheduled for submittal to HQUSACE in early July.



Authority for Reallocation
"January 2009 Chief Counsel Legal Opinion: Authority to Reallocate Storage under the Water Supply Act" (pdf, 105 KB)

Delegations and Guidance Revisions
"Delegations and Guidance Revisions" (pdf, 43 KB)

Hydropower Credits
"Determining Hydropower Account Credits" (pdf, 128 KB)

"OMBIL" (pdf, 2.63 MB)

Reallocation Studies
"Chatfield Storage Reallocation Study" (pdf, 8.7 MB)
"Determining Yield and Storage Requirement" (pdf, 2.4 MB)
"Hydropower Impact Analysis for Water Supply Reallocation Studies" (pdf, 613 KB)
"Lake Kemp Reallocation and Yield Determination with Riverware's MRM" (pdf, 1.04 MB)
"National Portfolio Assessment for Water Supply Reallocation" (pdf, 172 KB)
"Water Management and Reallocation Studies Planning Center of Expertise" (pdf, 358 KB)
"Water Supply Reallocation Dependable Yield Mitigation Storage" (pdf, 222 KB)

Reservior Sustainability
"Reservior Sustainability Initiative" (pdf, 2.53 MB)

Reservior Yield
"Reservior Yield R&D Unit" (pdf, 1.05 MB)
"Reservior Yield R&D Unit-Outline" (pdf, 636 KB)

Sedimentation Projections
"Tulsa District: Sedimentation Projections for our Reserviors" (pdf, 242 KB)

Water Supply Challenges
"The Corps of Engineers Water Supply Program-Cone" (pdf, 251 KB)
"The Corps of Engineers Water Supply Program-Hilyer" (pdf, 322 KB)
"Tulsa District Water Supply Challenges" (pdf, 28 KB)
"Little Rock District Water Supply Lessons Learned" (pdf, 58 KB)
"Nashville District Water Supply" (pdf, 722 KB)
"Procedure, Process and Pitfalls of WS Reallocation Reports" (pdf, 59 KB)
"System Approach to Water Supply in the Savannah River Basin" (pdf, 452 KB)
"Water Issues in Texas" (pdf, 1.39 MB)
"Water Supply Accounting-Spreadsheet" (pdf, 60 KB)
"Water Supply Storage Accounting-Bell" (pdf, 218 KB)
"Water Supply Challenges Baltimore District" (pdf, 1.10 MB)
"Working Together for Safer Dams and Increased Water Supply" (pdf, 1.20 MB)

Water Supply Storage Costs
"Chatfield Lake, CO Cost of Storage for M&I Water Supply" (pdf, 165 KB)
"Chatfield Lake, CO Cost of Storage-Spreadsheet" (pdf, 16 KB)
"Chatfiled Storable Inflows-Spreadsheet" (pdf, 41 KB)

Water supply graphic